The Shortest And Longest Wars Ever Fought

Wars are often remembered through battles, commanders and treaties, yet the calendar can tell a very different story. Some conflicts were over before most soldiers could properly organise, while others stretched across generations and became part of national identity.

The shortest war in widely accepted modern history lasted less than an hour. The longest conflicts are harder to define because they were usually interrupted by truces, changing rulers and long periods without major fighting. Calling something a single war can depend on whether historians focus on a legal state of war, a continuous campaign or a broader struggle between rival powers.

For readers in Australia, these time spans can feel especially striking. The First World War is closely associated with Anzac Day, the Gallipoli landing and dawn services held in cities from Sydney to Perth. Yet even that enormous global conflict lasted about four years, a short period beside wars that shaped centuries of European, Asian and Latin American history.

How historians measure a war

A war does not always have a clean beginning and ending. A declaration may start hostilities legally, but fighting could have begun months earlier. A peace treaty may be signed while rebellions continue, or armies may stop fighting for decades without formally settling the dispute.

The Hundred Years’ War is a useful example. It is usually dated from 1337 to 1453, giving it a length of 116 years. However, the fighting was divided into separate campaigns and long pauses. England and France were not battling continuously for 116 years, so the name describes a prolonged dynastic and political struggle rather than an uninterrupted battlefield.

The same issue appears with the longest contenders. The Roman–Persian Wars covered roughly 681 years if the major conflict between Rome and successive Persian empires is treated as one extended rivalry. That period included the Parthian and Sasanian empires, changing alliances and lengthy intervals of peace. It is more accurate to describe it as a series of related wars than one continuous campaign.

For that reason, records of the longest war should be read with a little caution. The shortest conflict is relatively easy to identify because the fighting was concentrated into a single morning. The longest is usually a contest between different definitions of duration.

The Anglo-Zanzibar War lasted less than an hour

The Anglo-Zanzibar War began on 27 August 1896 after the death of Sultan Hamad bin Thuwaini, who had maintained favourable relations with Britain. His successor, Sultan Khalid bin Barghash, seized the palace without British approval. Britain supported another candidate, Hamud bin Mohammed, and demanded that Khalid leave power.

At 9:00 am, after an ultimatum expired, British warships opened fire on the Sultan’s palace in Zanzibar City. The bombardment destroyed much of the palace complex and ended Khalid’s attempt to rule. He sought refuge in the German consulate, while Hamud was installed as sultan under British influence.

The fighting stopped at approximately 9:40 am, although exact timings vary slightly in historical accounts. The conflict therefore lasted around 38 to 45 minutes, making it the shortest war commonly cited in modern history. British forces suffered very few casualties, while Zanzibar’s losses were far higher, with estimates commonly placed at around 500 dead or wounded.

Its brevity did not make it politically insignificant. Zanzibar became more firmly controlled by Britain, and the episode showed how imperial power, naval technology and diplomatic pressure could decide a conflict almost instantly. In today’s terms, it was a war conducted with an ultimatum, warships and a decisive bombardment before the defending side had a realistic chance to respond.

Other remarkably brief conflicts

The Football War between El Salvador and Honduras in 1969 lasted around four days, although the name can be misleading. Football matches between the two countries helped inflame public feeling, but deeper causes included land disputes, migration, economic inequality and political tensions. Air raids and ground fighting followed, and the Organisation of American States helped negotiate a ceasefire.

The Six-Day War of June 1967 was another short but transformative conflict. Israel fought Egypt, Jordan and Syria from 5 to 10 June. Israel captured the Sinai Peninsula, Gaza Strip, West Bank, East Jerusalem and Golan Heights. The war changed borders, military calculations and diplomatic relations across the Middle East for decades.

The Ten-Day War in Slovenia in 1991 also ended quickly. After Slovenia declared independence from Yugoslavia, the Yugoslav People’s Army attempted to regain control. Fighting lasted from 27 June to 7 July, when the Brioni Agreement created a temporary pause and the army began withdrawing. Slovenia’s independence eventually became permanent, while the wider breakup of Yugoslavia led to much longer and bloodier wars.

These examples show why speed does not equal simplicity. A war may last only hours or days while producing lasting consequences. The Anglo-Zanzibar conflict changed the political future of an island, and the Six-Day War created disputes that remain central to international affairs.

The Hundred Years’ War was a long struggle, not one battle

The Hundred Years’ War began when Edward III of England claimed the French throne in 1337. The dispute was tied to feudal obligations, control of territory in France and the power of the English crown. Early English victories at Crécy in 1346 and Agincourt in 1415 demonstrated the effectiveness of longbowmen and disciplined infantry.

The conflict moved through several phases. The Black Death reduced populations and weakened economies, while truces repeatedly interrupted military operations. Joan of Arc helped revive French confidence during the siege of Orléans in 1429, and the French monarchy gradually recovered territory. By 1453, England had lost nearly all its possessions in mainland France except Calais.

Calling this a single 116-year war makes the history easier to remember, but it hides the rhythm of the conflict. There were stretches when armies were inactive, as well as civil wars, succession disputes and campaigns driven by local interests. It was a prolonged contest between two monarchies rather than one continuous battlefront.

The war also helped strengthen the idea of France and England as distinct political communities. English rulers eventually abandoned most claims in France, and both kingdoms developed stronger central governments. Its legacy can still be seen in museums, historical fiction and school curricula, much as Australian students encounter the campaigns and personalities surrounding Gallipoli.

Conflicts that lasted centuries

The Roman–Persian rivalry is a leading candidate for the longest series of wars. Roman and Parthian forces clashed from the first century BCE, followed by repeated wars with the Sasanian Empire until the Arab conquests of the seventh century CE. Borderlands such as Mesopotamia and Armenia changed hands many times, and major cities including Ctesiphon and Antioch became strategic prizes.

Another contender is the Reconquista, the Christian reconquest of territories ruled by Muslim powers in the Iberian Peninsula. It is often dated from 711, when Muslim armies entered Hispania, to 1492, when Granada fell to Ferdinand and Isabella. That span covers about 781 years, but it was not a single uninterrupted war. It included alliances between Christian and Muslim rulers, internal rivalries and long periods of peace.

The Arauco War in Chile is often dated from the 1530s to the 1820s, a period approaching three centuries. Spanish forces and the Mapuche fought through colonial rule, negotiated truces and repeated uprisings. Much of the conflict was decentralised, with frontier communities and local leaders playing major roles. This makes it a strong example of a long-running resistance struggle, though its exact end date is debated.

The Dutch Revolt, also called the Eighty Years’ War, lasted from 1568 to 1648, when Spain recognised the independence of the Dutch Republic. It included religious conflict, taxation disputes, resistance to Habsburg rule and competition over trade. Dutch commercial power expanded during the struggle, helping Amsterdam become one of Europe’s most important financial and trading centres.

Why some wars end quickly and others endure

Short wars often have a sharp imbalance in military power, a clearly vulnerable political target or a tightly limited objective. In Zanzibar, British naval guns could destroy the palace before local forces could organise a meaningful defence. Modern conflicts can also end rapidly when one side loses command centres, air superiority or international support.

Long wars tend to survive because neither side can secure a final victory. Difficult terrain, strong local identities and outside assistance can keep resistance alive. A kingdom may lose a city but retain its army, while an empire may win battles without being able to govern distant populations. In such conditions, fighting becomes cyclical, with truces followed by fresh campaigns.

Technology has changed the pace of battle, but it has not removed the political causes of war. A missile strike can happen in seconds, yet negotiating borders, protecting civilians and building a stable peace may take decades. Even the legal aftermath can be complicated, as governments preserve unusual rules and restrictions long after the emergency that created them. Collections of strange wartime laws offer a reminder that conflict can leave odd marks on everyday public life.

For Australians, the contrast is particularly visible in the way military history is remembered. Anzac Day services in Brisbane, Melbourne and smaller regional towns connect a single landing in 1915 with national stories about service and sacrifice. At the same time, the Australian defence market, museums and documentary industry continue to examine conflicts that lasted years or centuries, showing how war remains both a historical subject and a living part of public memory.

The shortest conflict demonstrates how quickly force can settle a political crisis, while the longest wars reveal how difficult it is to erase grievances, ambitions and identities. From a bombardment lasting under an hour to rivalries spanning hundreds of years, the history of warfare is measured in very different kinds of time.

Explore these conflicts through maps, museum collections and reliable historical sources, then share the most surprising example with friends who enjoy unusual facts about world history.